fix: Break retain cycle in CommandPalettePanel

[2witstudios]

Summary

• The onSelect and onDismiss closures in CommandPalettePanel.show() captured panel strongly, while panel owned the view controller that stored those closures
• This created a retain cycle (panel → contentViewController → closures → panel) that leaked memory every time the command palette was shown and dismissed
• Fixed by using [weak panel] captures in both closures

Test plan

• Open and dismiss the command palette multiple times — verify no memory growth in Instruments/Activity Monitor
• Verify command palette selection still works (dismiss + callback fire correctly)
• Verify escape-to-dismiss still works

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⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: f8e359c5-6f23-4d24-bac6-4e2c79b07d8b

📥 Commits

Reviewing files that changed from the base of the PR and between 55aa882 and 83c7b96.

📒 Files selected for processing (1)

• apps/purepoint-macos/purepoint-macos/Views/CommandPalette/CommandPalettePanel.swift

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch pu/fix-2

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[2witstudios]

Code review

No issues found. Checked for bugs and CLAUDE.md compliance.

🤖 Generated with Claude Code

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